#include <errno.h>
#include <uuid/uuid.h>
#include <ctype.h>
+#include <fcntl.h>
+#include <ftw.h>
+#include <mntent.h>
+#include <linux/limits.h>
+#include <getopt.h>
+
+#include <btrfsutil.h>
#include "kerncompat.h"
#include "ctree.h"
-#include "ioctl.h"
#include "utils.h"
#include "volumes.h"
-
-#include "version.h"
-
#include "commands.h"
+#include "cmds-fi-usage.h"
+#include "list_sort.h"
+#include "disk-io.h"
+#include "help.h"
+
+/*
+ * for btrfs fi show, we maintain a hash of fsids we've already printed.
+ * This way we don't print dups if a given FS is mounted more than once.
+ */
+static struct seen_fsid *seen_fsid_hash[SEEN_FSID_HASH_SIZE] = {NULL,};
static const char * const filesystem_cmd_group_usage[] = {
"btrfs filesystem [<group>] <command> [<args>]",
NULL
};
-static const char * const cmd_df_usage[] = {
- "btrfs filesystem df <path>",
+static const char * const cmd_filesystem_df_usage[] = {
+ "btrfs filesystem df
[options] <path>",
"Show space usage information for a mount point",
+ HELPINFO_UNITS_SHORT_LONG,
NULL
};
-static int cmd_df(int argc, char **argv)
+static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
{
- struct btrfs_ioctl_space_args *sargs, *sargs_orig;
- u64 count = 0, i;
+ u64 count = 0;
int ret;
- int fd;
- int e;
- char *path;
-
- if (check_argc_exact(argc, 2))
- usage(cmd_df_usage);
-
- path = argv[1];
+ struct btrfs_ioctl_space_args *sargs;
- fd = open_file_or_dir(path);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
- return 12;
- }
-
- sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
+ sargs = malloc(sizeof(struct btrfs_ioctl_space_args));
if (!sargs)
return -ENOMEM;
sargs->total_spaces = 0;
ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
- e = errno;
- if (ret) {
- fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
- path, strerror(e));
- close(fd);
+ if (ret < 0) {
+ error("cannot get space info: %m");
free(sargs);
- return ret;
+ return -errno;
}
+ /* This really should never happen */
if (!sargs->total_spaces) {
- close(fd);
free(sargs);
- return 0;
+ return -ENOENT;
}
-
count = sargs->total_spaces;
+ free(sargs);
- sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) +
+ sargs = malloc(sizeof(struct btrfs_ioctl_space_args) +
(count * sizeof(struct btrfs_ioctl_space_info)));
- if (!sargs) {
- close(fd);
- free(sargs_orig);
+ if (!sargs)
return -ENOMEM;
- }
sargs->space_slots = count;
sargs->total_spaces = 0;
-
ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs);
- e = errno;
- if (ret) {
- fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n",
- path, strerror(e));
- close(fd);
+ if (ret < 0) {
+ error("cannot get space info with %llu slots: %m",
+ count);
free(sargs);
- return ret;
+ return -errno;
}
+ *sargs_ret = sargs;
+ return 0;
+}
- for (i = 0; i < sargs->total_spaces; i++) {
- char description[80];
- char *total_bytes;
- char *used_bytes;
- int written = 0;
- u64 flags = sargs->spaces[i].flags;
+static void print_df(struct btrfs_ioctl_space_args *sargs, unsigned unit_mode)
+{
+ u64 i;
+ struct btrfs_ioctl_space_info *sp = sargs->spaces;
+
+ for (i = 0; i < sargs->total_spaces; i++, sp++) {
+ printf("%s, %s: total=%s, used=%s\n",
+ btrfs_group_type_str(sp->flags),
+ btrfs_group_profile_str(sp->flags),
+ pretty_size_mode(sp->total_bytes, unit_mode),
+ pretty_size_mode(sp->used_bytes, unit_mode));
+ }
+}
- memset(description, 0, 80);
+static int cmd_filesystem_df(int argc, char **argv)
+{
+ struct btrfs_ioctl_space_args *sargs = NULL;
+ int ret;
+ int fd;
+ char *path;
+ DIR *dirstream = NULL;
+ unsigned unit_mode;
- if (flags & BTRFS_BLOCK_GROUP_DATA) {
- if (flags & BTRFS_BLOCK_GROUP_METADATA) {
- snprintf(description, 14, "%s",
- "Data+Metadata");
- written += 13;
- } else {
- snprintf(description, 5, "%s", "Data");
- written += 4;
- }
- } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
- snprintf(description, 7, "%s", "System");
- written += 6;
- } else if (flags & BTRFS_BLOCK_GROUP_METADATA) {
- snprintf(description, 9, "%s", "Metadata");
- written += 8;
- }
+ unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
- if (flags & BTRFS_BLOCK_GROUP_RAID0) {
- snprintf(description+written, 8, "%s", ", RAID0");
- written += 7;
- } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
- snprintf(description+written, 8, "%s", ", RAID1");
- written += 7;
- } else if (flags & BTRFS_BLOCK_GROUP_DUP) {
- snprintf(description+written, 6, "%s", ", DUP");
- written += 5;
- } else if (flags & BTRFS_BLOCK_GROUP_RAID10) {
- snprintf(description+written, 9, "%s", ", RAID10");
- written += 8;
- } else if (flags & BTRFS_BLOCK_GROUP_RAID5) {
- snprintf(description+written, 9, "%s", ", RAID5");
- written += 7;
- } else if (flags & BTRFS_BLOCK_GROUP_RAID6) {
- snprintf(description+written, 9, "%s", ", RAID6");
- written += 7;
- }
+ clean_args_no_options(argc, argv, cmd_filesystem_df_usage);
+
+ if (check_argc_exact(argc - optind, 1))
+ usage(cmd_filesystem_df_usage);
+
+ path = argv[optind];
+
+ fd = btrfs_open_dir(path, &dirstream, 1);
+ if (fd < 0)
+ return 1;
- total_bytes = pretty_sizes(sargs->spaces[i].total_bytes);
- used_bytes = pretty_sizes(sargs->spaces[i].used_bytes);
- printf("%s: total=%s, used=%s\n", description, total_bytes,
- used_bytes);
+ ret = get_df(fd, &sargs);
+
+ if (ret == 0) {
+ print_df(sargs, unit_mode);
+ free(sargs);
+ } else {
+ error("get_df failed %s", strerror(-ret));
}
- close(fd);
- free(sargs);
+
+ close_file_or_dir(fd, dirstream);
+ return !!ret;
+}
+
+static int match_search_item_kernel(u8 *fsid, char *mnt, char *label,
+ char *search)
+{
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
+ int search_len = strlen(search);
+
+ search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
+ uuid_unparse(fsid, uuidbuf);
+ if (!strncmp(uuidbuf, search, search_len))
+ return 1;
+
+ if (*label && strcmp(label, search) == 0)
+ return 1;
+
+ if (strcmp(mnt, search) == 0)
+ return 1;
return 0;
}
-static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search)
+static int uuid_search(struct btrfs_fs_devices *fs_devices, const char *search)
{
- char uuidbuf[37];
- struct list_head *cur;
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
struct btrfs_device *device;
int search_len = strlen(search);
- search_len = min(search_len, 37);
+ search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
uuid_unparse(fs_devices->fsid, uuidbuf);
if (!strncmp(uuidbuf, search, search_len))
return 1;
- list_for_each(cur, &fs_devices->devices) {
- device = list_entry(cur, struct btrfs_device, dev_list);
+ list_for_each_entry(device, &fs_devices->devices, dev_list) {
if ((device->label && strcmp(device->label, search) == 0) ||
strcmp(device->name, search) == 0)
return 1;
return 0;
}
-static void print_one_uuid(struct btrfs_fs_devices *fs_devices)
+/*
+ * Sort devices by devid, ascending
+ */
+static int cmp_device_id(void *priv, struct list_head *a,
+ struct list_head *b)
+{
+ const struct btrfs_device *da = list_entry(a, struct btrfs_device,
+ dev_list);
+ const struct btrfs_device *db = list_entry(b, struct btrfs_device,
+ dev_list);
+
+ return da->devid < db->devid ? -1 :
+ da->devid > db->devid ? 1 : 0;
+}
+
+static void splice_device_list(struct list_head *seed_devices,
+ struct list_head *all_devices)
+{
+ struct btrfs_device *in_all, *next_all;
+ struct btrfs_device *in_seed, *next_seed;
+
+ list_for_each_entry_safe(in_all, next_all, all_devices, dev_list) {
+ list_for_each_entry_safe(in_seed, next_seed, seed_devices,
+ dev_list) {
+ if (in_all->devid == in_seed->devid) {
+ /*
+ * When do dev replace in a sprout fs
+ * to a dev in its seed fs, the replacing
+ * dev will reside in the sprout fs and
+ * the replaced dev will still exist
+ * in the seed fs.
+ * So pick the latest one when showing
+ * the sprout fs.
+ */
+ if (in_all->generation
+ < in_seed->generation) {
+ list_del(&in_all->dev_list);
+ free(in_all);
+ } else if (in_all->generation
+ > in_seed->generation) {
+ list_del(&in_seed->dev_list);
+ free(in_seed);
+ }
+ break;
+ }
+ }
+ }
+
+ list_splice(seed_devices, all_devices);
+}
+
+static void print_devices(struct btrfs_fs_devices *fs_devices,
+ u64 *devs_found, unsigned unit_mode)
+{
+ struct btrfs_device *device;
+ struct btrfs_fs_devices *cur_fs;
+ struct list_head *all_devices;
+
+ all_devices = &fs_devices->devices;
+ cur_fs = fs_devices->seed;
+ /* add all devices of seed fs to the fs to be printed */
+ while (cur_fs) {
+ splice_device_list(&cur_fs->devices, all_devices);
+ cur_fs = cur_fs->seed;
+ }
+
+ list_sort(NULL, all_devices, cmp_device_id);
+ list_for_each_entry(device, all_devices, dev_list) {
+ printf("\tdevid %4llu size %s used %s path %s\n",
+ (unsigned long long)device->devid,
+ pretty_size_mode(device->total_bytes, unit_mode),
+ pretty_size_mode(device->bytes_used, unit_mode),
+ device->name);
+
+ (*devs_found)++;
+ }
+}
+
+static void print_one_uuid(struct btrfs_fs_devices *fs_devices,
+ unsigned unit_mode)
{
- char uuidbuf[37];
- struct list_head *cur;
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
struct btrfs_device *device;
- char *super_bytes_used;
u64 devs_found = 0;
u64 total;
+ if (add_seen_fsid(fs_devices->fsid, seen_fsid_hash, -1, NULL))
+ return;
+
uuid_unparse(fs_devices->fsid, uuidbuf);
device = list_entry(fs_devices->devices.next, struct btrfs_device,
dev_list);
else
printf("Label: none ");
- super_bytes_used = pretty_sizes(device->super_bytes_used);
-
total = device->total_devs;
printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
- (unsigned long long)total, super_bytes_used);
+ (unsigned long long)total,
+ pretty_size_mode(device->super_bytes_used, unit_mode));
- free(super_bytes_used);
+ print_devices(fs_devices, &devs_found, unit_mode);
- list_for_each(cur, &fs_devices->devices) {
- char *total_bytes;
- char *bytes_used;
- device = list_entry(cur, struct btrfs_device, dev_list);
- total_bytes = pretty_sizes(device->total_bytes);
- bytes_used = pretty_sizes(device->bytes_used);
- printf("\tdevid %4llu size %s used %s path %s\n",
- (unsigned long long)device->devid,
- total_bytes, bytes_used, device->name);
- free(total_bytes);
- free(bytes_used);
- devs_found++;
- }
if (devs_found < total) {
printf("\t*** Some devices missing\n");
}
printf("\n");
}
-static const char * const cmd_show_usage[] = {
- "btrfs filesystem show [--all-devices] [<uuid>|<label>]",
+/* adds up all the used spaces as reported by the space info ioctl
+ */
+static u64 calc_used_bytes(struct btrfs_ioctl_space_args *si)
+{
+ u64 ret = 0;
+ int i;
+ for (i = 0; i < si->total_spaces; i++)
+ ret += si->spaces[i].used_bytes;
+ return ret;
+}
+
+static int print_one_fs(struct btrfs_ioctl_fs_info_args *fs_info,
+ struct btrfs_ioctl_dev_info_args *dev_info,
+ struct btrfs_ioctl_space_args *space_info,
+ char *label, unsigned unit_mode)
+{
+ int i;
+ int fd;
+ int missing = 0;
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
+ struct btrfs_ioctl_dev_info_args *tmp_dev_info;
+ int ret;
+
+ ret = add_seen_fsid(fs_info->fsid, seen_fsid_hash, -1, NULL);
+ if (ret == -EEXIST)
+ return 0;
+ else if (ret)
+ return ret;
+
+ uuid_unparse(fs_info->fsid, uuidbuf);
+ if (label && *label)
+ printf("Label: '%s' ", label);
+ else
+ printf("Label: none ");
+
+ printf(" uuid: %s\n\tTotal devices %llu FS bytes used %s\n", uuidbuf,
+ fs_info->num_devices,
+ pretty_size_mode(calc_used_bytes(space_info),
+ unit_mode));
+
+ for (i = 0; i < fs_info->num_devices; i++) {
+ char *canonical_path;
+
+ tmp_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info[i];
+
+ /* Add check for missing devices even mounted */
+ fd = open((char *)tmp_dev_info->path, O_RDONLY);
+ if (fd < 0) {
+ missing = 1;
+ continue;
+ }
+ close(fd);
+ canonical_path = canonicalize_path((char *)tmp_dev_info->path);
+ printf("\tdevid %4llu size %s used %s path %s\n",
+ tmp_dev_info->devid,
+ pretty_size_mode(tmp_dev_info->total_bytes, unit_mode),
+ pretty_size_mode(tmp_dev_info->bytes_used, unit_mode),
+ canonical_path);
+
+ free(canonical_path);
+ }
+
+ if (missing)
+ printf("\t*** Some devices missing\n");
+ printf("\n");
+ return 0;
+}
+
+static int btrfs_scan_kernel(void *search, unsigned unit_mode)
+{
+ int ret = 0, fd;
+ int found = 0;
+ FILE *f;
+ struct mntent *mnt;
+ struct btrfs_ioctl_fs_info_args fs_info_arg;
+ struct btrfs_ioctl_dev_info_args *dev_info_arg = NULL;
+ struct btrfs_ioctl_space_args *space_info_arg = NULL;
+ char label[BTRFS_LABEL_SIZE];
+
+ f = setmntent("/proc/self/mounts", "r");
+ if (f == NULL)
+ return 1;
+
+ memset(label, 0, sizeof(label));
+ while ((mnt = getmntent(f)) != NULL) {
+ free(dev_info_arg);
+ dev_info_arg = NULL;
+ if (strcmp(mnt->mnt_type, "btrfs"))
+ continue;
+ ret = get_fs_info(mnt->mnt_dir, &fs_info_arg,
+ &dev_info_arg);
+ if (ret)
+ goto out;
+
+ /* skip all fs already shown as mounted fs */
+ if (is_seen_fsid(fs_info_arg.fsid, seen_fsid_hash))
+ continue;
+
+ ret = get_label_mounted(mnt->mnt_dir, label);
+ /* provide backward kernel compatibility */
+ if (ret == -ENOTTY)
+ ret = get_label_unmounted(
+ (const char *)dev_info_arg->path, label);
+
+ if (ret)
+ goto out;
+
+ if (search && !match_search_item_kernel(fs_info_arg.fsid,
+ mnt->mnt_dir, label, search)) {
+ continue;
+ }
+
+ fd = open(mnt->mnt_dir, O_RDONLY);
+ if ((fd != -1) && !get_df(fd, &space_info_arg)) {
+ print_one_fs(&fs_info_arg, dev_info_arg,
+ space_info_arg, label, unit_mode);
+ free(space_info_arg);
+ memset(label, 0, sizeof(label));
+ found = 1;
+ }
+ if (fd != -1)
+ close(fd);
+ }
+
+out:
+ free(dev_info_arg);
+ endmntent(f);
+ return !found;
+}
+
+static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
+{
+ struct btrfs_fs_devices *cur_seed, *next_seed;
+ struct btrfs_device *device;
+
+ while (!list_empty(&fs_devices->devices)) {
+ device = list_entry(fs_devices->devices.next,
+ struct btrfs_device, dev_list);
+ list_del(&device->dev_list);
+
+ free(device->name);
+ free(device->label);
+ free(device);
+ }
+
+ /* free seed fs chain */
+ cur_seed = fs_devices->seed;
+ fs_devices->seed = NULL;
+ while (cur_seed) {
+ next_seed = cur_seed->seed;
+ free(cur_seed);
+
+ cur_seed = next_seed;
+ }
+
+ list_del(&fs_devices->list);
+ free(fs_devices);
+}
+
+static int copy_device(struct btrfs_device *dst,
+ struct btrfs_device *src)
+{
+ dst->devid = src->devid;
+ memcpy(dst->uuid, src->uuid, BTRFS_UUID_SIZE);
+ if (src->name == NULL)
+ dst->name = NULL;
+ else {
+ dst->name = strdup(src->name);
+ if (!dst->name)
+ return -ENOMEM;
+ }
+ if (src->label == NULL)
+ dst->label = NULL;
+ else {
+ dst->label = strdup(src->label);
+ if (!dst->label) {
+ free(dst->name);
+ return -ENOMEM;
+ }
+ }
+ dst->total_devs = src->total_devs;
+ dst->super_bytes_used = src->super_bytes_used;
+ dst->total_bytes = src->total_bytes;
+ dst->bytes_used = src->bytes_used;
+ dst->generation = src->generation;
+
+ return 0;
+}
+
+static int copy_fs_devices(struct btrfs_fs_devices *dst,
+ struct btrfs_fs_devices *src)
+{
+ struct btrfs_device *cur_dev, *dev_copy;
+ int ret = 0;
+
+ memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE);
+ INIT_LIST_HEAD(&dst->devices);
+ dst->seed = NULL;
+
+ list_for_each_entry(cur_dev, &src->devices, dev_list) {
+ dev_copy = malloc(sizeof(*dev_copy));
+ if (!dev_copy) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ ret = copy_device(dev_copy, cur_dev);
+ if (ret) {
+ free(dev_copy);
+ break;
+ }
+
+ list_add(&dev_copy->dev_list, &dst->devices);
+ dev_copy->fs_devices = dst;
+ }
+
+ return ret;
+}
+
+static int find_and_copy_seed(struct btrfs_fs_devices *seed,
+ struct btrfs_fs_devices *copy,
+ struct list_head *fs_uuids) {
+ struct btrfs_fs_devices *cur_fs;
+
+ list_for_each_entry(cur_fs, fs_uuids, list)
+ if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE))
+ return copy_fs_devices(copy, cur_fs);
+
+ return 1;
+}
+
+static int has_seed_devices(struct btrfs_fs_devices *fs_devices)
+{
+ struct btrfs_device *device;
+ int dev_cnt_total, dev_cnt = 0;
+
+ device = list_first_entry(&fs_devices->devices, struct btrfs_device,
+ dev_list);
+
+ dev_cnt_total = device->total_devs;
+
+ list_for_each_entry(device, &fs_devices->devices, dev_list)
+ dev_cnt++;
+
+ return dev_cnt_total != dev_cnt;
+}
+
+static int search_umounted_fs_uuids(struct list_head *all_uuids,
+ char *search, int *found)
+{
+ struct btrfs_fs_devices *cur_fs, *fs_copy;
+ struct list_head *fs_uuids;
+ int ret = 0;
+
+ fs_uuids = btrfs_scanned_uuids();
+
+ /*
+ * The fs_uuids list is global, and open_ctree_* will
+ * modify it, make a private copy here
+ */
+ list_for_each_entry(cur_fs, fs_uuids, list) {
+ /* don't bother handle all fs, if search target specified */
+ if (search) {
+ if (uuid_search(cur_fs, search) == 0)
+ continue;
+ if (found)
+ *found = 1;
+ }
+
+ /* skip all fs already shown as mounted fs */
+ if (is_seen_fsid(cur_fs->fsid, seen_fsid_hash))
+ continue;
+
+ fs_copy = calloc(1, sizeof(*fs_copy));
+ if (!fs_copy) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = copy_fs_devices(fs_copy, cur_fs);
+ if (ret) {
+ free(fs_copy);
+ goto out;
+ }
+
+ list_add(&fs_copy->list, all_uuids);
+ }
+
+out:
+ return ret;
+}
+
+static int map_seed_devices(struct list_head *all_uuids)
+{
+ struct btrfs_fs_devices *cur_fs, *cur_seed;
+ struct btrfs_fs_devices *seed_copy;
+ struct btrfs_fs_devices *opened_fs;
+ struct btrfs_device *device;
+ struct btrfs_fs_info *fs_info;
+ struct list_head *fs_uuids;
+ int ret = 0;
+
+ fs_uuids = btrfs_scanned_uuids();
+
+ list_for_each_entry(cur_fs, all_uuids, list) {
+ device = list_first_entry(&cur_fs->devices,
+ struct btrfs_device, dev_list);
+ if (!device)
+ continue;
+
+ /* skip fs without seeds */
+ if (!has_seed_devices(cur_fs))
+ continue;
+
+ /*
+ * open_ctree_* detects seed/sprout mapping
+ */
+ fs_info = open_ctree_fs_info(device->name, 0, 0, 0,
+ OPEN_CTREE_PARTIAL);
+ if (!fs_info)
+ continue;
+
+ /*
+ * copy the seed chain under the opened fs
+ */
+ opened_fs = fs_info->fs_devices;
+ cur_seed = cur_fs;
+ while (opened_fs->seed) {
+ seed_copy = malloc(sizeof(*seed_copy));
+ if (!seed_copy) {
+ ret = -ENOMEM;
+ goto fail_out;
+ }
+ ret = find_and_copy_seed(opened_fs->seed, seed_copy,
+ fs_uuids);
+ if (ret) {
+ free(seed_copy);
+ goto fail_out;
+ }
+
+ cur_seed->seed = seed_copy;
+
+ opened_fs = opened_fs->seed;
+ cur_seed = cur_seed->seed;
+ }
+
+ close_ctree(fs_info->chunk_root);
+ }
+
+out:
+ return ret;
+fail_out:
+ close_ctree(fs_info->chunk_root);
+ goto out;
+}
+
+static const char * const cmd_filesystem_show_usage[] = {
+ "btrfs filesystem show [options] [<path>|<uuid>|<device>|label]",
"Show the structure of a filesystem",
+ "-d|--all-devices show only disks under /dev containing btrfs filesystem",
+ "-m|--mounted show only mounted btrfs",
+ HELPINFO_UNITS_LONG,
"If no argument is given, structure of all present filesystems is shown.",
NULL
};
-static int cmd_show(int argc, char **argv)
+static int cmd_filesystem_show(int argc, char **argv)
{
- struct list_head *all_uuids;
+ LIST_HEAD(all_uuids);
struct btrfs_fs_devices *fs_devices;
- struct list_head *cur_uuid;
- char *search = 0;
+ char *search = NULL;
int ret;
- int checklist = 1;
- int searchstart = 1;
+ /* default, search both kernel and udev */
+ int where = -1;
+ int type = 0;
+ char mp[PATH_MAX];
+ char path[PATH_MAX];
+ u8 fsid[BTRFS_FSID_SIZE];
+ char uuid_buf[BTRFS_UUID_UNPARSED_SIZE];
+ unsigned unit_mode;
+ int found = 0;
+
+ unit_mode = get_unit_mode_from_arg(&argc, argv, 0);
+
+ while (1) {
+ int c;
+ static const struct option long_options[] = {
+ { "all-devices", no_argument, NULL, 'd'},
+ { "mounted", no_argument, NULL, 'm'},
+ { NULL, 0, NULL, 0 }
+ };
+
+ c = getopt_long(argc, argv, "dm", long_options, NULL);
+ if (c < 0)
+ break;
+ switch (c) {
+ case 'd':
+ where = BTRFS_SCAN_LBLKID;
+ break;
+ case 'm':
+ where = BTRFS_SCAN_MOUNTED;
+ break;
+ default:
+ usage(cmd_filesystem_show_usage);
+ }
+ }
- if( argc > 1 && !strcmp(argv[1],"--all-devices")){
- checklist = 0;
- searchstart += 1;
+ if (check_argc_max(argc, optind + 1))
+ usage(cmd_filesystem_show_usage);
+
+ if (argc > optind) {
+ search = argv[optind];
+ if (*search == 0)
+ usage(cmd_filesystem_show_usage);
+ type = check_arg_type(search);
+
+ /*
+ * For search is a device:
+ * realpath do /dev/mapper/XX => /dev/dm-X
+ * which is required by BTRFS_SCAN_DEV
+ * For search is a mountpoint:
+ * realpath do /mnt/btrfs/ => /mnt/btrfs
+ * which shall be recognized by btrfs_scan_kernel()
+ */
+ if (realpath(search, path))
+ search = path;
+
+ /*
+ * Needs special handling if input arg is block dev And if
+ * input arg is mount-point just print it right away
+ */
+ if (type == BTRFS_ARG_BLKDEV && where != BTRFS_SCAN_LBLKID) {
+ ret = get_btrfs_mount(search, mp, sizeof(mp));
+ if (!ret) {
+ /* given block dev is mounted */
+ search = mp;
+ type = BTRFS_ARG_MNTPOINT;
+ } else {
+ ret = dev_to_fsid(search, fsid);
+ if (ret) {
+ error("no btrfs on %s", search);
+ return 1;
+ }
+ uuid_unparse(fsid, uuid_buf);
+ search = uuid_buf;
+ type = BTRFS_ARG_UUID;
+ goto devs_only;
+ }
+ }
}
- if (check_argc_max(argc, searchstart + 1))
- usage(cmd_show_usage);
+ if (where == BTRFS_SCAN_LBLKID)
+ goto devs_only;
- if(checklist)
- ret = btrfs_scan_block_devices(0);
- else
- ret = btrfs_scan_one_dir("/dev", 0);
+ /* show mounted btrfs */
+ ret = btrfs_scan_kernel(search, unit_mode);
+ if (search && !ret) {
+ /* since search is found we are done */
+ goto out;
+ }
+
+ /* shows mounted only */
+ if (where == BTRFS_SCAN_MOUNTED)
+ goto out;
- if (ret){
- fprintf(stderr, "ERROR: error %d while scanning\n", ret);
- return 18;
+devs_only:
+ ret = btrfs_scan_devices();
+
+ if (ret) {
+ error("blkid device scan returned %d", ret);
+ return 1;
}
-
- if(searchstart < argc)
- search = argv[searchstart];
- all_uuids = btrfs_scanned_uuids();
- list_for_each(cur_uuid, all_uuids) {
- fs_devices = list_entry(cur_uuid, struct btrfs_fs_devices,
- list);
- if (search && uuid_search(fs_devices, search) == 0)
- continue;
- print_one_uuid(fs_devices);
+ ret = search_umounted_fs_uuids(&all_uuids, search, &found);
+ if (ret < 0) {
+ error("searching target device returned error %d", ret);
+ return 1;
}
- printf("%s\n", BTRFS_BUILD_VERSION);
- return 0;
+
+ /*
+ * The seed/sprout mapping are not detected yet,
+ * do mapping build for all umounted fs
+ */
+ ret = map_seed_devices(&all_uuids);
+ if (ret) {
+ error("mapping seed devices returned error %d", ret);
+ return 1;
+ }
+
+ list_for_each_entry(fs_devices, &all_uuids, list)
+ print_one_uuid(fs_devices, unit_mode);
+
+ if (search && !found) {
+ error("not a valid btrfs filesystem: %s", search);
+ ret = 1;
+ }
+ while (!list_empty(&all_uuids)) {
+ fs_devices = list_entry(all_uuids.next,
+ struct btrfs_fs_devices, list);
+ free_fs_devices(fs_devices);
+ }
+out:
+ free_seen_fsid(seen_fsid_hash);
+ return ret;
}
-static const char * const cmd_sync_usage[] = {
+static const char * const cmd_filesystem_sync_usage[] = {
"btrfs filesystem sync <path>",
"Force a sync on a filesystem",
NULL
};
-static int cmd_sync(int argc, char **argv)
+static int cmd_filesystem_sync(int argc, char **argv)
{
- int fd, res, e;
- char *path;
-
- if (check_argc_exact(argc, 2))
- usage(cmd_sync_usage);
+ enum btrfs_util_error err;
- path = argv[1];
+ clean_args_no_options(argc, argv, cmd_filesystem_sync_usage);
- fd = open_file_or_dir(path);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
- return 12;
- }
+ if (check_argc_exact(argc - optind, 1))
+ usage(cmd_filesystem_sync_usage);
- printf("FSSync '%s'\n", path);
- res = ioctl(fd, BTRFS_IOC_SYNC);
- e = errno;
- close(fd);
- if( res < 0 ){
- fprintf(stderr, "ERROR: unable to fs-syncing '%s' - %s\n",
- path, strerror(e));
- return 16;
+ err = btrfs_util_sync(argv[optind]);
+ if (err) {
+ error_btrfs_util(err);
+ return 1;
}
return 0;
return BTRFS_COMPRESS_ZLIB;
else if (strcmp(optarg, "lzo") == 0)
return BTRFS_COMPRESS_LZO;
+ else if (strcmp(optarg, "zstd") == 0)
+ return BTRFS_COMPRESS_ZSTD;
else {
- fprintf(stderr, "Unknown compress type %s\n", s);
+ error("unknown compression type %s", s);
exit(1);
};
}
-static const char * const cmd_defrag_usage[] = {
+static const char * const cmd_filesystem_defrag_usage[] = {
"btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...]",
"Defragment a file or a directory",
"",
- "-v be verbose",
- "-c[zlib,lzo] compress the file while defragmenting",
- "-f flush data to disk immediately after defragmenting",
- "-s start defragment only from byte onward",
- "-l len defragment only up to len bytes",
- "-t size minimal size of file to be considered for defragmenting",
+ "-v be verbose",
+ "-r defragment files recursively",
+ "-c[zlib,lzo,zstd] compress the file while defragmenting",
+ "-f flush data to disk immediately after defragmenting",
+ "-s start defragment only from byte onward",
+ "-l len defragment only up to len bytes",
+ "-t size target extent size hint (default: 32M)",
+ "",
+ "Warning: most Linux kernels will break up the ref-links of COW data",
+ "(e.g., files copied with 'cp --reflink', snapshots) which may cause",
+ "considerable increase of space usage. See btrfs-filesystem(8) for",
+ "more information.",
NULL
};
-static int cmd_defrag(int argc, char **argv)
+static struct btrfs_ioctl_defrag_range_args defrag_global_range;
+static int defrag_global_verbose;
+static int defrag_global_errors;
+static int defrag_callback(const char *fpath, const struct stat *sb,
+ int typeflag, struct FTW *ftwbuf)
+{
+ int ret = 0;
+ int fd = 0;
+
+ if ((typeflag == FTW_F) && S_ISREG(sb->st_mode)) {
+ if (defrag_global_verbose)
+ printf("%s\n", fpath);
+ fd = open(fpath, O_RDWR);
+ if (fd < 0) {
+ goto error;
+ }
+ ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &defrag_global_range);
+ close(fd);
+ if (ret && errno == ENOTTY) {
+ error(
+"defrag range ioctl not supported in this kernel version, 2.6.33 and newer is required");
+ defrag_global_errors++;
+ return ENOTTY;
+ }
+ if (ret) {
+ goto error;
+ }
+ }
+ return 0;
+
+error:
+ error("defrag failed on %s: %m", fpath);
+ defrag_global_errors++;
+ return 0;
+}
+
+static int cmd_filesystem_defrag(int argc, char **argv)
{
int fd;
int flush = 0;
u64 start = 0;
u64 len = (u64)-1;
- u32 thresh = 0;
+ u64 thresh;
int i;
- int errors = 0;
+ int recursive = 0;
int ret = 0;
- int verbose = 0;
- int fancy_ioctl = 0;
- struct btrfs_ioctl_defrag_range_args range;
- int e=0;
int compress_type = BTRFS_COMPRESS_NONE;
-
- optind = 1;
+ DIR *dirstream;
+
+ /*
+ * Kernel has a different default (256K) that is supposed to be safe,
+ * but it does not defragment very well. The 32M will likely lead to
+ * better results and is independent of the kernel default. We have to
+ * use the v2 defrag ioctl.
+ */
+ thresh = SZ_32M;
+
+ defrag_global_errors = 0;
+ defrag_global_verbose = 0;
+ defrag_global_errors = 0;
while(1) {
- int c = getopt(argc, argv, "vc::fs:l:t:");
+ int c = getopt(argc, argv, "vrc::fs:l:t:");
if (c < 0)
break;
compress_type = BTRFS_COMPRESS_ZLIB;
if (optarg)
compress_type = parse_compress_type(optarg);
- fancy_ioctl = 1;
break;
case 'f':
flush = 1;
- fancy_ioctl = 1;
break;
case 'v':
- verbose = 1;
+ defrag_global_verbose = 1;
break;
case 's':
start = parse_size(optarg);
- fancy_ioctl = 1;
break;
case 'l':
len = parse_size(optarg);
- fancy_ioctl = 1;
break;
case 't':
thresh = parse_size(optarg);
- fancy_ioctl = 1;
+ if (thresh > (u32)-1) {
+ warning(
+ "target extent size %llu too big, trimmed to %u",
+ thresh, (u32)-1);
+ thresh = (u32)-1;
+ }
+ break;
+ case 'r':
+ recursive = 1;
break;
default:
- usage(cmd_defrag_usage);
+ usage(cmd_filesystem_defrag_usage);
}
}
if (check_argc_min(argc - optind, 1))
- usage(cmd_defrag_usage);
+ usage(cmd_filesystem_defrag_usage);
- memset(&range, 0, sizeof(range));
- range.start = start;
- range.len = len;
- range.extent_thresh = thresh;
+ memset(&defrag_global_range, 0, sizeof(defrag_global_range));
+ defrag_global_range.start = start;
+ defrag_global_range.len = len;
+ defrag_global_range.extent_thresh = (u32)thresh;
if (compress_type) {
- range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
- range.compress_type = compress_type;
+ defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
+ defrag_global_range.compress_type = compress_type;
}
if (flush)
- range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
+ defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_START_IO;
+
+ /*
+ * Look for directory arguments and warn if the recursive mode is not
+ * requested, as this is not implemented as recursive defragmentation
+ * in kernel. The stat errors are silent here as we check them below.
+ */
+ if (!recursive) {
+ int found = 0;
+
+ for (i = optind; i < argc; i++) {
+ struct stat st;
+
+ if (stat(argv[i], &st))
+ continue;
+
+ if (S_ISDIR(st.st_mode)) {
+ warning(
+ "directory specified but recursive mode not requested: %s",
+ argv[i]);
+ found = 1;
+ }
+ }
+ if (found) {
+ warning(
+"a directory passed to the defrag ioctl will not process the files\n"
+"recursively but will defragment the subvolume tree and the extent tree.\n"
+"If this is not intended, please use option -r .");
+ }
+ }
for (i = optind; i < argc; i++) {
- if (verbose)
- printf("%s\n", argv[i]);
- fd = open_file_or_dir(argv[i]);
+ struct stat st;
+ int defrag_err = 0;
+
+ dirstream = NULL;
+ fd = open_file_or_dir(argv[i], &dirstream);
if (fd < 0) {
- fprintf(stderr, "failed to open %s\n", argv[i]);
- perror("open:");
- errors++;
- continue;
+ error("cannot open %s: %m", argv[i]);
+ ret = -errno;
+ goto next;
}
- if (!fancy_ioctl) {
- ret = ioctl(fd, BTRFS_IOC_DEFRAG, NULL);
- e=errno;
+
+ ret = fstat(fd, &st);
+ if (ret) {
+ error("failed to stat %s: %m", argv[i]);
+ ret = -errno;
+ goto next;
+ }
+ if (!(S_ISDIR(st.st_mode) || S_ISREG(st.st_mode))) {
+ error("%s is not a directory or a regular file",
+ argv[i]);
+ ret = -EINVAL;
+ goto next;
+ }
+ if (recursive && S_ISDIR(st.st_mode)) {
+ ret = nftw(argv[i], defrag_callback, 10,
+ FTW_MOUNT | FTW_PHYS);
+ if (ret == ENOTTY)
+ exit(1);
+ /* errors are handled in the callback */
+ ret = 0;
} else {
- ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE, &range);
- if (ret && errno == ENOTTY) {
- fprintf(stderr, "ERROR: defrag range ioctl not "
- "supported in this kernel, please try "
- "without any options.\n");
- errors++;
- close(fd);
+ if (defrag_global_verbose)
+ printf("%s\n", argv[i]);
+ ret = ioctl(fd, BTRFS_IOC_DEFRAG_RANGE,
+ &defrag_global_range);
+ defrag_err = errno;
+ if (ret && defrag_err == ENOTTY) {
+ error(
+"defrag range ioctl not supported in this kernel version, 2.6.33 and newer is required");
+ defrag_global_errors++;
+ close_file_or_dir(fd, dirstream);
break;
}
+ if (ret) {
+ error("defrag failed on %s: %s", argv[i],
+ strerror(defrag_err));
+ goto next;
+ }
}
- if (ret) {
- fprintf(stderr, "ERROR: defrag failed on %s - %s\n",
- argv[i], strerror(e));
- errors++;
- }
- close(fd);
- }
- if (verbose)
- printf("%s\n", BTRFS_BUILD_VERSION);
- if (errors) {
- fprintf(stderr, "total %d failures\n", errors);
- exit(1);
+next:
+ if (ret)
+ defrag_global_errors++;
+ close_file_or_dir(fd, dirstream);
}
- return errors + 20;
+ if (defrag_global_errors)
+ fprintf(stderr, "total %d failures\n", defrag_global_errors);
+
+ return !!defrag_global_errors;
}
-static const char * const cmd_resize_usage[] = {
- "btrfs filesystem resize [devid:][+/-]<newsize>[
gkm]|[devid:]max <path>",
+static const char * const cmd_filesystem_resize_usage[] = {
+ "btrfs filesystem resize [devid:][+/-]<newsize>[
kKmMgGtTpPeE]|[devid:]max <path>",
"Resize a filesystem",
"If 'max' is passed, the filesystem will occupy all available space",
"on the device 'devid'.",
+ "[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
NULL
};
-static int cmd_resize(int argc, char **argv)
+static int cmd_filesystem_resize(int argc, char **argv)
{
struct btrfs_ioctl_vol_args args;
int fd, res, len, e;
char *amount, *path;
+ DIR *dirstream = NULL;
+ struct stat st;
+
+ clean_args_no_options_relaxed(argc, argv);
- if (check_argc_exact(argc, 3))
- usage(cmd_resize_usage);
+ if (check_argc_exact(argc - optind, 2))
+ usage(cmd_filesystem_resize_usage);
- amount = argv[1];
- path = argv[2];
+ amount = argv[optind];
+ path = argv[optind + 1];
len = strlen(amount);
if (len == 0 || len >= BTRFS_VOL_NAME_MAX) {
- fprintf(stderr, "ERROR: size value too long ('%s)\n",
- amount);
- return 14;
+ error("resize value too long (%s)", amount);
+ return 1;
}
- fd = open_file_or_dir(path);
- if (fd < 0) {
- fprintf(stderr, "ERROR: can't access to '%s'\n", path);
- return 12;
+ res = stat(path, &st);
+ if (res < 0) {
+ error("resize: cannot stat %s: %m", path);
+ return 1;
}
+ if (!S_ISDIR(st.st_mode)) {
+ error("resize works on mounted filesystems and accepts only\n"
+ "directories as argument. Passing file containing a btrfs image\n"
+ "would resize the underlying filesystem instead of the image.\n");
+ return 1;
+ }
+
+ fd = btrfs_open_dir(path, &dirstream, 1);
+ if (fd < 0)
+ return 1;
printf("Resize '%s' of '%s'\n", path, amount);
+ memset(&args, 0, sizeof(args));
strncpy_null(args.name, amount);
res = ioctl(fd, BTRFS_IOC_RESIZE, &args);
e = errno;
- close(fd);
+ close_file_or_dir(fd, dirstream);
if( res < 0 ){
- fprintf(stderr, "ERROR: unable to resize '%s' - %s\n",
- path, strerror(e));
- return 30;
+ switch (e) {
+ case EFBIG:
+ error("unable to resize '%s': no enough free space",
+ path);
+ break;
+ default:
+ error("unable to resize '%s': %m", path);
+ break;
+ }
+ return 1;
+ } else if (res > 0) {
+ const char *err_str = btrfs_err_str(res);
+
+ if (err_str) {
+ error("resizing of '%s' failed: %s", path, err_str);
+ } else {
+ error("resizing of '%s' failed: unknown error %d",
+ path, res);
+ }
+ return 1;
}
return 0;
}
-static const char * const cmd_label_usage[] = {
- "btrfs filesystem label [<device>|<mountpoint>] [<newlabel>]",
+static const char * const cmd_filesystem_label_usage[] = {
+ "btrfs filesystem label [<device>|<mount_point>] [<newlabel>]",
"Get or change the label of a filesystem",
"With one argument, get the label of filesystem on <device>.",
"If <newlabel> is passed, set the filesystem label to <newlabel>.",
NULL
};
-static int cmd_label(int argc, char **argv)
+static int cmd_filesystem_label(int argc, char **argv)
{
- if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
- usage(cmd_label_usage);
+ clean_args_no_options(argc, argv, cmd_filesystem_label_usage);
- if (argc > 2)
- return set_label(argv[1], argv[2]);
- else
- return get_label(argv[1]);
+ if (check_argc_min(argc - optind, 1) ||
+ check_argc_max(argc - optind, 2))
+ usage(cmd_filesystem_label_usage);
+
+ if (argc - optind > 1) {
+ return set_label(argv[optind], argv[optind + 1]);
+ } else {
+ char label[BTRFS_LABEL_SIZE];
+ int ret;
+
+ ret = get_label(argv[optind], label);
+ if (!ret)
+ fprintf(stdout, "%s\n", label);
+
+ return ret;
+ }
}
+static const char filesystem_cmd_group_info[] =
+"overall filesystem tasks and information";
+
const struct cmd_group filesystem_cmd_group = {
- filesystem_cmd_group_usage, NULL, {
- { "df", cmd_df, cmd_df_usage, NULL, 0 },
- { "show", cmd_show, cmd_show_usage, NULL, 0 },
- { "sync", cmd_sync, cmd_sync_usage, NULL, 0 },
- { "defragment", cmd_defrag, cmd_defrag_usage, NULL, 0 },
- { "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
- { "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
- { "label", cmd_label, cmd_label_usage, NULL, 0 },
- { 0, 0, 0, 0, 0 },
+ filesystem_cmd_group_usage, filesystem_cmd_group_info, {
+ { "df", cmd_filesystem_df, cmd_filesystem_df_usage, NULL, 0 },
+ { "du", cmd_filesystem_du, cmd_filesystem_du_usage, NULL, 0 },
+ { "show", cmd_filesystem_show, cmd_filesystem_show_usage, NULL,
+ 0 },
+ { "sync", cmd_filesystem_sync, cmd_filesystem_sync_usage, NULL,
+ 0 },
+ { "defragment", cmd_filesystem_defrag,
+ cmd_filesystem_defrag_usage, NULL, 0 },
+ { "balance", cmd_balance, NULL, &balance_cmd_group,
+ CMD_HIDDEN },
+ { "resize", cmd_filesystem_resize, cmd_filesystem_resize_usage,
+ NULL, 0 },
+ { "label", cmd_filesystem_label, cmd_filesystem_label_usage,
+ NULL, 0 },
+ { "usage", cmd_filesystem_usage,
+ cmd_filesystem_usage_usage, NULL, 0 },
+
+ NULL_CMD_STRUCT
}
};
projects / platform / upstream / btrfs-progs.git / blobdiff